Welcome to the future. Biological warfare has decimated humankind. Los Angeles is a windswept ghost town where Robert Neville tools his convertible through sunlit streets foraging for supplies. And makes damn sure he gets undercover before sundown, when other “survivors” emerge.

The Omega Man adapts Twilight Zone alumnus Richard Matheson’s classic sci-fi novel I Am Legend into a high-impact, high-tension tale of a future not far removed from the realm of possibility. Charlton Heston (who has starred in other futuristic movie greats as Planet of the Apes and Soylent Green) is Neville, crusading to keep himself alive — and to fend off “The Family,” blood-thirsty neopeople that aren’t quite human anymore.

Rosalind Cash co-stars as the caretaker of a small band of healthy children who represent the future of our species — if she and Neville can keep them from “The Family’s” grasp. Take The Omega Man into your grasp. At first a sensational action film, it also raises chilling questions about where humankind is headed. Like the best science fiction always does.